Toy vehicle

ABSTRACT

A toy or model vehicle wherein a laterally opening hollow housing or truck is provided with a motor rotor having a horizontal shaft, and drive means are interposed between the motor shaft and running gear.

Unite States Cheng et al.

atet [191 Nov. 11, 1975 1 TOY VEHICLE [75] Inventors: Richard C. M.Cheng; Gene Patrick Dennis; Robert Edward Kircher, all of WoodburyHeights, NJ.

[73] Assignee: Consolidated Foods Corporation,

Woodbury Heights, N .J.

[22] Filed: Feb. 21, 1974 [21] Appl. No.: 444,330

[52] US. Cl 46/206; 46/217; 105/24 R; 105/49; 105/157 T 51] Int. Cl.A63H 19/02 [58] Field of Search 46/206, 217, 243 M, 243 LV;

105/1 T, 34 R, 49,157 T [56] References Cited UNITED STATES PATENTS3,009,425 1 H1961 Lingard 46/217 Miura 46/206 Nielson 46/206 FOREIGNPATENTS OR APPLICATIONS 225,082 12/1962 Austria 46/217 PrimaryExaminer-Hugh R. Chamblee Assistant Examiner-Robert F. Cutting Attorney,Agent, or Firm-Seidel, Gonda & Goldhammer ABSTRACT A toy or modelvehicle wherein a laterally opening hollow housing or truck is providedwith a motor rotor having a horizontal shaft, and drive means areinterposed between the motor shaft and running gear.

16 Claims, 6 Drawing Figures US. Patent Nov. 11, 1975 Sheet 1 of33,918,198

/22 II II 52 U.S. Patent Nov. 11, 1975 Sheet 2 of3 3,918,198

F/G. 4 a5 95 a4 95 US. Patent Nov. 11, 1975 Sheet 3 of3 3,918,198

TOY VEHICLE BACKGROUND OF THE INVENTION While the structure of thepresent invention has been primarily developed and employed in modelrailroad vehicles, and will be illustrated and described hereinafterwith particular reference thereto, it is appreciated that theimprovements disclosed herein are capable of additional application andvariations, all of which are intended to be comprehended herein.

Prior traction systems for model vehicles, for instance model railroadlocomotives, have been relatively expensive to manufacture, both in theproduction of component parts and assembly thereof.

SUMMARY OF THE INVENTION It is, therefore, an important object of thepresent invention to provide a unique and highly improved tractionsystem for model vehicles, such as model railroad locomotives, which iswell adapted to effect substantial savings in manufacturing costs, bothin the production of component parts and in their assembly.

It is another object of the present invention to provide a tractionsystem for model vehicles having the advantageous characteristicsmentioned in the preceding paragraph, which assures optimum operatingcharacteristics over a long useful life, with a minimum of downtime forrepairs, and wherein repairs can be quickly and easily effected withoutthe need for special tools or skills.

Other objects of the present invention will become apparent upon readingthe following specification and referring to the accompanying drawings,which form a material part of this disclosure.

The invention accordingly consists in the features of construction,combinations of elements, and arrangements of parts, which will beexemplified in the construction hereinafter described, and of which thescope will be indicated by the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevational viewshowing a model vehicle, such as a model railroad locomotive, showingcertain elements of the traction system in dashed lines, and broken awayto further illustrate certain elements of the traction system in solidlines.

FIG. 2 is a horizontal sectional view taken generally along the line 22of FIG. 1, enlarged for clarity.

FIG. 3 is a partial sectional elevational view taken generally along theline 33 of FIG. 2.

FIG. 4 is a bottom view taken generally along the line 4-4 of FIG. 3.

FIG. 5 is an exploded perspective view of the instant traction systemfrom one side thereof.

FIG. 6 is a perspective view showing a component of the traction systemfrom the other side.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now more particularlyto the drawings, and specifically to FIGS. 1-4 thereof, a vehicle isthere generally designated 10, and for purposes of illustration andwithout limiting intent is shown as an accurately simulated, modellocomotive, such as a diesel locomotive. The vehicle 10 includes anouter hollow body 11, say suitably configured and decorated to simulatea desired locomotive, and advantageously fabricated of plastic, as byinjection molding, or the like. The body 11 includes a pair of oppositeside walls 12 and 13, extending generally longitudinally, in upright,parallel spaced relation and interconnected along their upperextremities by a longitudinally extending, generally transverselyhorizontal top wall 14. Extending in closing relation across the frontand rear ends of the side and top walls 12, 13 and 14 are front and rearend walls 15 and 16. The interior of the body 1 l, as between the sidewalls 12 and 13, top wall 14 and end walls 15 and 16 is hollow, as at17, and opens downwardly between the side and end walls.

In the illustrated embodiment of vehicle 10, there is shown a simulatedlocomotive having a pair of forward and rearward ground engageabletrucks 21 and 22, one or both of which may be powered, as desired. Ofcourse, other vehicles may, in accordance with the teachings of thepresent invention have more or less trucks, in accordance with a desiredsimulation. For simplicity and clarity herein, the forward truck 21 maybe considered as unpowered, while the rear truck 22 is powered. Inpractice, the unpowered truck 21 may be essentially similar to the powertruck 22, the former having rail engageable wheeled running gear 23identical to the rail engageable wheeled running gear 24 of the latter,and a gimbaled mount similar to the gimbal means 25 of the truck 22.

More specifically, the power truck 22 is shown in greater detail inFIGS. 2 and 3, and especially in the exploded view of FIG. 5. It willthere be seen that the truck includes an upright, longitudinallyextending block-like member or housing 30, say die cast or otherwisesuitably formed of advantageously heavy material. The housing includes'alower base portion 31 having opposite end extensions 32 and 33 providedrespectively with upturned lips 34 and 35, for a purpose appearingpresently. The underside of the housing base portion 31 may be formed,at spaced locations therealong, with a downwardly facing, transverselyextending, open ended recesses or grooves, say three in number as at 36,37 and 38.

Upstanding from the housing base portion 31 is an elongate block-likeintermediate housing portion 40. The intermediate housing portion 40terminates in opposite end regions 41 and 42 defining respective endfaces 43 and 44, respectively adjacent to and inward of base portionends 32 and 33. Each end region 41 and 42 includes a generallyhorizontal upper surface, as at 45 and 46; and, one side of theintermediate housing portion 40 is recessed, as best seen in FIG. 6, therecess being designated 47 and continuing downwardly in the base portion31 and opening downwardly through the under surface of the base portion.The downwardly and laterally outwardly opening recess 47 is specificallyconfigured for a purpose appearing presently.

An upper housing portion 50 upstands from the intermediate housingportion 40, extending longitudinally thereof and terminating in faces 51and 52 respectively adjacent to and longitudinally inward ofintermediate housing portion end faces 43 and 44. The upper housingportion 50 may be laterally coextensive with the intennediate housingportion 40, and there may be formed a substantial hollow or recess 53occupying the major part of the upper housing portion 50, extendingdownwardly therefrom slightly into the intermediate housing portion 40,and opening laterally outwardly from the housing, as best seen in FIG.5. The hollow or recess 53 includes a generally circular or cylindricalcentral portion 54, and a pair of arcuate segmental portions 55 and 56adjacent to opposite ends of the housing and opening into the centralportion 54. Additionally, the upper housing portion 50 is formed throughone side, see FIG. 6, with a through opening or hole 57 opening into theinterior of hollow 53, generally coaxially with the central hollowportion 54. Spaced on pposite sides of the through opening or hole 57,say above and below the latter, there may be formed a pair of additionalopenings, passageways or holes 58 and 59, also communicating with theinterior of the central hollow portion 54.

Projecting from opposite end faces 51 and 52 of the uppper housingportion 50, longitudinally thereof, are respective retainer formationsor ribs 61 and 62. The ribs 61 and 62 may be laterally coextensive withthe end faces 51 and 52, being spaced over the respective nethersurfaces 45 and 46, and may be somewhat arcuate, if desired, in thehorizontal plane. Further, the re tainer formations or ribs 61 and 62are each advantageously formed with a beveled end surface, as at 63 and64, which bevels extend obliquely downwardly and longitudinallyoutwardly. Beneath the retainer ribs 62 and 63, the upper housingportion 50 may be formed with a guide formation or face, spacedlongitudinally inward of the respective beveled surfaces 63 and 64, asat 65 and 66. The guide faces 65 and 66 may also be generally arcuate ina horizontal plan, and further, may project laterally outwardly beyondthe adjacent region of upper housing portion 50.

As will appear presently in greater detail, the housing 30 serves tohouse a motor or suitable drive means, which may include a motor rotor70, see FIG. 5, advantageously of the flat or pancake type. The rotor 70may be conventional, carrying a shaft 71 and suitable windings andassociated commutator. The rotor 70 is rotatably disposed generallycoaxially within the central cylindrical region 54 of interior hollow53, the rotor shaft 71 having one end extending for suitable joumalinginto the wall opening 59. Conventional magnets or pole pieces 72 and 73may be associated with the rotor 70, say being of arcuate configurationand respectively conformably engaged in the arcuate regions 55 and 56 ofhollow 53. A housing closure or cover plate 75 may be removably securedin closing relation with the hollow 53, as by suitable releasablefastener means, such as threaded members 76 engageable into the housing30. The closure or cover plate 75 may provide suitable bearing means, asat 77 for journaling the rotor shaft 71, and may also carry suitableelectrical contact means, such as motor brushes by brush holders 78.

The running gear 22 may include three pairs or sets of wheels, such asthe pair of wheels 80, 80a, the wheel pair 81 and 81a, and the pair ofwheels 82 and 82a. The wheels 80, 81 and 82 are arranged inlongitudinally spaced relation with each other on one side of thehousing 30, carrying respective gears 83, 84 and 85. Each pair of wheelsis connected by a respective axle, the wheel pair 80, 80a being carriedby axle 86, the wheel pair 81, 810 being carried by axle 87, and thewheel pair 82, 82a being carried by axle 88. The axles 86, 87 and 88 arerotatably received in respective nether formations or grooves 36, 37 and38 on the underside of housing 30, so that the wheels 80a, 8 la and 82aare arranged in longitudinally spaced, side-by-side relation on the sideof motor housing 30 opposite to that of wheels 80, 81 and 82. While theembodiment illustrated and described herein discloses a six-wheel truck,it is appreciated that the teachings of the instant invention areequally applicable to trucks having different numbers of wheels, forexample a four-wheel truck may be commonly employed.

Disposed in facing engagement with the underside of the motor housing 30is an axle retainer, generally designated 90, including an elongate,generally flat plate 91 for conforming disposition in facing engagementwith the underside of the motor housing 30. At opposite ends of theplate 91, upstanding therefrom are snap fittings, fingers or catches 92and 93, and the plate may be formed intermediate its ends with fastenerreceiving openings 94. Projecting laterally outwardly from oppositesides of the plate 91, are brackets or holders 95 and 96 for supportingtruck side pieces as at 97, simulative of a desired vehicle.

In assembly, with the plate 91 in facing engagement with the undersideof motor housing 30, the snap fittings or catches 92 and 93 areremovably engaged over respective lips 34 and 35. That is, by suitablyforming the axle retainer means 90, say by integral molding of plastic,sufficient resilience is imparted to permit snap engagement and removalof the retainer with respect to the motor housing 30. Additionally, ifdesired, more permanent fastening means may be employed, such as screws98 extending through plate holes 94 into the motor housing 30.

Suitable drive means, such as gearing 100, see FIG. 5, may be interposedin motion transmitting relation between the motor rotor and the wheels82. The drive means may include a pinion 101 carried by the rotor shaft71 exteriorly of the housing 30, opposite to the closure 75. A spur gear102 may be rotatably mounted on the housing 30 in meshing engagementwith the pinion 101, and may carry a pinion 103. Additionally a pair ofspur gears 104 and 105 may be mounted on the housing 30, say located inupper por' tions of the recess 47, and each in meshing engagementbetween a pair of wheel carried gears 83, 84 and 85. The wheel carriedgears 83, 84 and may be coplanar with each other and with the gears 104and 105, and be located in lower regions of the recess 47. Thus, it willbe appreciated that there is a positive driving connection by the drivemeans or transmission between the rotor shaft 71 and each of the wheelaxles 86, 87 and 88.

As noted hereinbefore, the truck 22 is suitably mounted in the hollowvehicle body 10 by gimbal means 25, so that the truck is afforded,within limits, movement about perpendicular axes relative to the body.The gimbal means includes a collar 110, having a closed outlineconfiguration, and advantageously fabricated of resiliently deformablymaterial, such as being injection molded by plastic, or otherwise formedof suitable material. The collar includes a pair of iongitudinallyspaced, opposed arcuate segments 111 and 112. In particular, the arcuatesegments 111 and 112 may have their concave sides facing toward eachother, each having a chordal or lateral dimension approximating theinternal dimension of the body 10. Connecting the arcuate segments 11and 12 together are a pair of generally parallel spaced, longitudinallyextending elongate members or sides 113 and 114, which combine with eachother and the arcuate end segments to define the collar 110. Carried byeach side piece 113 and 114, medially between -the arcuate endrnembers111 and 112 may be an upstanding formation or boss, as at 115 and 116.The bosses 115 and 116 are laterally opposed, and each formed with asubstantially circular or cylindrical through hole or socket, as at 117and 118, which sockets are in axial alignment with each other,transversely of the collar 110, and open upwardly through theirrespective bosses 115 and 116 In assembly of the collar 110 with themotor housing 30, slight lateral compression of the collar, justsufficient to slightly flex the arcuate end segments 111 and 112longitudinally outwardly, will permit of snap engagement of the collardownwardly over the retainer ribs or lips 61 and 62. Upon release of thecollar compressive force, the collar returns to its normal, undis:tended configuration, such that the arcuate end seg-, ments 111 and 112are respectively captured along the guide faces 65 and 66. That is, thearcuate end segment 111 of collar 110 is retained between body face 45and projecting rib or lip 61, while collar end segment 112 is retainedbetween body face 4.6 and projecting lip or rib 62. It will thus beapparent that, within limits, the collar 110 is rotatable in oppositedirections about a generally vertical axis relative to themotor housing30, the collar being retained on the housing by the ribs61 and 62, beingshiftably supported on housing faces 45 and 46, and constrained torotative movement by the guide faces 65 and 66. Viewed otherwise, thetruck 22 may be considered as mountedfor limited rotatative movement inopposite directions relative to the collar 110, the opposite arcuatecollar end segments: 111 and 112 defining guides or way means somounting the truck.

The gimbal 25 further includes an additional annular member of closedoutline configuration, such as the yoke 120, superposed over the collar110. The yoke 120 may include a pair of spaced end members 121 and 122,and a pair of spaced side members 123 and 124, extending between andconnecting together the ends of the end members, and combining therewithto define generally annular yoke. The side members 123 and 124 arespaced apart and have their outside dimension approximately equal to theoutside dimension of the collar side members 113 and 114 for conformingengagement between the side walls 12 and 13 of the vehicle body 10.Further, there are provided on opposite side members 123 and 124 of theyoke 120 a pair of noncircular lugs or fastener elements 125 and 126.

Depending beneath the underside of each side piece 123 and 124 iscarried a pintle or pivot element, as at 127 and 128. That is, thepintle elements or pivots 127 and 128 are axially aligned with eachother transversely of the yoke 120, and depend therebeneath for rotativeengagement in respective openings or sockets 117 and 118. Thus, the yoke120 is connected to the collar 110 for limited rotation relative theretoabout a transversely extending generally horizontal axis normal to therotative axis of the collar relative to the truck. Thus, a universalrelative movement is afforded between the yoke 120 and the truck 22, andvice versa.

The opposite side walls 12 and 13 of the vehicle body are formed withslots, as at 129 and 130, respectively conformably receiving fastenerlugs 125 and 126 to relatively immovably connect the yoke 120 to thevehicle body 10. In this manner, the truck 22 is afforded a limiteduniversal movement relative to the vehicle body. By the inherentresilience of the yoke 120 and the vehicle body 10, the fastener lugs125 and 126 may be snap engaged into and removed from the body slots 129and 130.

Advantageously, the yoke 120 is provided with resilient restoring means,such as in the form of a pair of flexible spring fingers 131 and 132extending from each side piece 123 and 124 into yieldable bearingengagement with the adjacent nether side piece 113, 114 of the lowercollar 110. The resilient means or spring fingers 131 and 132 serve toyieldably urge the gimbal elements, namely the yoke 120 and collar totheir intermediate position of relative movement about the axis. ofpintles or pivots 127 and 128. Thus, a resilient restoring force isapplied to the truck 22 to urge the latter to an intermediate positionof its swinging movement about the pivot axis of pintles 127 and 128.This position is shown in FIG. 3, wherein both spring fingers 132 areapproximately equally resiliently distended.

From the foregoing, it will now be apparent that a model toy vehicle isprovided in accordance with the teachings of the instant invention whichfully accomplishes its intended objects and is otherwise well adapted tomeet practical conditions of manufacture, assembly, maintenance and use.

Although the present invention has been described in some detail by wayof illustration and example for purposes of clarity of understanding, itis understood that certain changes and modifications may be made withinthe spirit of the invention.

What is claimed is: p

1. In a toy vehicle, the combination comprising a unitary, block-like,upright truck housing having first and second recesses opening laterallyfrom opposite sides of said housing, a motor in said first recess androtatable about a laterally extending axis, a motor shaft projectinglaterally through and from the opposite side of said housing from saidfirst recess, wheeled running gear on the underside of said housing androtatable about generally laterally extending axes, and drive means inmotion transmitting relation between such shaft and said running gearfor driving the latter, at least portions of said drive means and saidrunning gear fitting in said second recess and portions of said runninggear extending from a downward opening of said second recess.

2. A toy vehicle according to claim 1, said wheeled running gearcomprising axle means extending laterally across and removably journaledin the underside of said housing, a retainer plate beneath said housingretaining said axle means, and snap fittings on said retainer plateremovably securing the latter to said housing.

3. A toy vehicle according to claim 2, said snap fittings being integralwith said retainer plate.

4. A toy vehicle according to claim 1, said motor comprising a pancaketype rotor having its shaft generally parallel to said axle means, andsaid drive means comprising spur gear means.

5. A toy vehicle according to claim 1, in combination with a hollowvehicle body having a downwardly directed opening for spacedly receivingsaid housing with said running gear beneath said body, and gimbal meansinterconnecting said housing and vehicle body for limited rotationalmovement of said running gear about generally vertical and horizontalaxes relative to said body.

6. A toy vehicle according to claim 5, said gimbal means comprisingpivot means having a generally laterally extending pivotal axis,fastener means securing said pivot means in said body, and arcuate waymeans mounted on said pivot means for limited rotation about saidpivotal axis, said arcuate way means holding said housing for limitedrotation about a generally upright axis relative to said way means, andresilient means yieldably urging said way means to an intermediateposition of said limited rotation about said pivotal axis.

7. A toy vehicle according to claim 6, said way means comprising acollar rotatably circumposed about said housing, and said pivot meanscomprising a yoke member, and a pair of laterally opposed aligned pivotson said yoke member pivotally connected to said collar.

8. A toy vehicle according to claim 7, said resilient means comprising apair of resilient fingers each extending from one of said yoke andcollar into opposite urging engagement with the other of said yoke andcollar.

9. A toy vehicle according to claim 8, said yoke being generally annularand spacedly surrounding said housmg.

10. In a model land vehicle, the combination comprising a wheeled truckfor rolling engagement with a supporting surface, a body over saidtruck, and a gimbal structure connecting said body and truck, saidgimbal structure comprising a generally horizontal collar circumposedabout said truck for limited rotation relative thereto about an uprightaxis, a yoke pivotally connected to said collar for limited rotationrelative thereto about a generally horizontal axis, and fastener meansconnecting said yoke to said body, whereby said truck is connected tosaid body and movable relative thereto about generally perpendicularaxes.

11. A model land vehicle according to claim 10, in combination withresilient means interposed between said collar and yoke for yieldablyurging the latter toward an intermediate position of its rotativemovement.

12. A model land vehicle according to claim 11, said resilient meanscomprising spring fingers extending between said yoke and collar.

13. A model land vehicle according to claim 10, said collar includingopposite arcuate segments, and said truck including opposite formationsslidably receiving said arcuate segments and mounting said truck forsaid relative rotation.

14. A model land vehicle according to claim 13, said collar and truckbeing configured for snap engagement of said segments into saidformations.

15. A model land vehicle according to claim 13, in combination withinterengageable pivot and socket means on said yoke and collarintermediate said arcuate segments to effect said pivotal connection.

16. A model land vehicle according to claim 15, said collar includingopposite sides extending between said segments and spaced apart forconforming engagement in said body to limit lateral collar movement, andsaid yoke being sized for conforming engagement in said body to limitlateral yoke movement, said pivot and socket means being interengageableupon relative lateral movement between said yoke and collar, wherebysaid pivot and socket means are interengaged when said yoke and collarare exteriorly of said body and disengagement is prevented when saidyoke and collar are in said body.

1. In a toy vehicle, the combination comprising a unitary, block-like,upright truck housing having first and second recesses opening laterallyfrom opposite sides of said housing, a motor in said first recess androtatable about a laterally extending axis, a motor shaft projectinglaterally through and from the opposite side of said housing from saidfirst recess, wheeled running gear on the underside of said housing androtatable about generally laterally extending axes, and drive means inmotion transmitting relation between such shaft and said running gearfor driving the latter, at least portions of said drive means and saidrunning gear fitting in said second recess and portions of said runninggear extending from a downward opening of said second recess.
 2. A toyvehicle according to claim 1, said wheeled running gear comprising axlemeans extending laterally across and removably journaled in theunderside of said housing, a retainer plate beneath said housingretaining said axle means, and snap fittings on said retainer plateremovably securing the latter to said housing.
 3. A toy vehicleaccording to claim 2, said snap fittings being integral with saidretainer plate.
 4. A toy vehicle according to claim 1, said motorcomprising a pancake type rotor having its shaft generally parallel tosaid axle means, and said drive means comprising spur gear means.
 5. Atoy vehicle according to claim 1, in combination with a hollow vehiclebody having a downwardly directed opening for spacedly receiving saidhousing with said running gear beneath said body, and gimbal meansinterconnecting said housing and vehicle body for limited rotationalmovement of said running gear about generally vertical and horizontalaxes relative to said body.
 6. A toy vehicle according to claim 5, saidgimbal means comprising pivot means having a generally laterallyextending pivotal axis, fastener means securing said pivot means in saidbody, and arcuate way means mounted on said pivot means for limitedrotation about said pivotal axis, said arcuate way means holding saidhousing for limited rotation about a generally upright axis relative tosaid way means, and resilient means yieldably urging said way means toan intermediate position of said limited rotation about said pivotalaxis.
 7. A toy vehicle according to claim 6, said way means comprising acollar rotatably circumposed about said housing, and said pivot meanscomprising a yoke member, and a pair of laterally opposed aligned pivotson said yoke member pivotally connected to said collar.
 8. A toy vehicleaccording to claim 7, said resilient means comprising a pair ofresilient fingers each extending from one of said yoke and collar intoopposite urging engagement with the other of said yoke and collar.
 9. Atoy vehicle according to claim 8, said yoke being generally annular andspacedly surrounding said housing.
 10. In a model land vehicle, thecombination comprising a wheeled truck for rolling engagement with asupporting surface, a body over said truck, and a gimbal structureconnecting said body and truck, said gimbal structure comprising agenerally horizontal collar circumposed about said truck for limitedrotation relative thereto about an upright axis, a yoke pivotallyconnected to said collar for limited rotation relative thereto about agenerally horizontal axis, and fastener means connecting said yoke tosaid body, whereby said truck is connected to said body and movablerelative thereto about generally perpendicular axes.
 11. A model landvehicle according to claim 10, in combination with resilient meansinterposed between said collar and yoke for yieldably urging the lattertoward an intermediate position of its rotative movement.
 12. A modelland vehicle according to claim 11, said resilient means comprisingspring fingers extending between said yoke and collar.
 13. A model landvehicle according to claim 10, said collar including opposite arcuatesegments, and said truck including opposite formations slidablyreceiving said arcuate segments and mounting said truck for saidrelative rotation.
 14. A model land vehicle according to claim 13, saidcollar and truck being configured for snap engagement of said segmentsinto said formations.
 15. A model land vehicle according to claim 13, incombination with interengageable pivot and socket means on said yoke andcollar intermediate said arcuate segments to effect said pivotalconnection.
 16. A model Land vehicle according to claim 15, said collarincluding opposite sides extending between said segments and spacedapart for conforming engagement in said body to limit lateral collarmovement, and said yoke being sized for conforming engagement in saidbody to limit lateral yoke movement, said pivot and socket means beinginterengageable upon relative lateral movement between said yoke andcollar, whereby said pivot and socket means are interengaged when saidyoke and collar are exteriorly of said body and disengagement isprevented when said yoke and collar are in said body.